n. A popular name of the scaups or sea-ducks of the genus Aithyia: as, the greater and lesser blackheads, A. marila and A. affinis. See scaup.n. A local name in the United States of the black-headed minnow, or fathead, Pimphales promelas.n. In entomology, the larva of an American tortricid moth, Eudemis vacciniana, which feeds on the leaves of the cranberry. Also called fire-worm.n. A common name for comedo. See comedo.